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Humidistat 1D10T 08-09-2007
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Posted by 1D10T on August 9, 2007, 9:19 pm
I read that if you set the T-stat to 70º and the H-stat to what you
*perceive* to be a comfort level, the AC only runs to achieve the relative
humidity set on the H-stat. It went on to say that it helps to keep the unit
from cycling as often as it normally would, thereby saving electricity and
still be comfortable. The THI here for a week has been 110 - 115, and it
just got me to wondering. As inexpensive as the H-stats are I thought it
would be worth a try - or at least the time it takes to do all this typing.
:-)
Opinions appreciated!
TIA
- - - - - - - - - - - - - - - - - - -
Easy's gettin' harder everyday



Posted by udarrell on August 9, 2007, 11:01 pm
1D10T wrote:

>I read that if you set the T-stat to 70º and the H-stat to what you
>*perceive* to be a comfort level, the AC only runs to achieve the relative
>humidity set on the H-stat. It went on to say that it helps to keep the unit
>from cycling as often as it normally would, thereby saving electricity and
>still be comfortable. The THI here for a week has been 110 - 115, and it
>just got me to wondering. As inexpensive as the H-stats are I thought it
>would be worth a try - or at least the time it takes to do all this typing.
>:-)
>Opinions appreciated!
>TIA
>- - - - - - - - - - - - - - - - - - -
>Easy's gettin' harder everyday
>
>
The two controls are wired in parallel (Not in series) therefore, if
either the Temperature or the Humidity set points are Not met, the AC
contactor will stay energized & the AC unit will stay running.
Especially if the system is somewhat oversized, it is a good way to go.
- udarrell

--
WISDOM PRINCIPLE DIRECTED EMPOWERMENT COMMUNICATIONS -
THE REAL POLITICAL ISSUES and WISDOM BASED PEOPLE EMPOWERMENT

http://www.udarrell.com/

http://www.udarrell.com/my_pages2.htm
(* My Airconditioning Links, Hunting Shooting, Angus Cattle, etc.)

http://www.udarrell.com/principled_adjudication_disputes_administration_justice.html

http://www.udarrell.com/recognizing_real_enemies.html

http://jesuschristsavior.net/Beatitudes.html

http://www.antiwar.com/ ***

Reality Is Not An Easy Thing To Be Confronted With, or to Accept!

Posted by Smarty on August 9, 2007, 11:12 pm
Wiring the humidistat and thermostat in parallel should theoretically work,
but.............

most humdistats are designed to *********close********* their contacts when
the humidity falls below a specific set-point (so as to energize a
humidifier) and therefore, will *******do the opposite******* of what the
original poster intended******* if wired in parallel as recommended.

What is actually needed is a humidistat which closes it contacts when the
humidity level *****rises***** above a specific set-point,. thereby
energizing the air conditioning when there is too much humidity.

Using a conventional humidistat as the prior reply indicates will ***NOT
WORK*** as claimed, and, in fact, will turn on the a/c and keep it on as the
air gets drier.......


Smarty



> 1D10T wrote:
>
>>I read that if you set the T-stat to 70º and the H-stat to what you
>>*perceive* to be a comfort level, the AC only runs to achieve the relative
>>humidity set on the H-stat. It went on to say that it helps to keep the
>>unit
>>from cycling as often as it normally would, thereby saving electricity and
>>still be comfortable. The THI here for a week has been 110 - 115, and it
>>just got me to wondering. As inexpensive as the H-stats are I thought it
>>would be worth a try - or at least the time it takes to do all this
>>typing.
>>:-)
>>Opinions appreciated!
>>TIA
>>- - - - - - - - - - - - - - - - - - -
>>Easy's gettin' harder everyday
> The two controls are wired in parallel (Not in series) therefore, if
> either the Temperature or the Humidity set points are Not met, the AC
> contactor will stay energized & the AC unit will stay running. Especially
> if the system is somewhat oversized, it is a good way to go. - udarrell
>
> --
> WISDOM PRINCIPLE DIRECTED EMPOWERMENT COMMUNICATIONS - THE REAL POLITICAL
> ISSUES and WISDOM BASED PEOPLE EMPOWERMENT
>
> http://www.udarrell.com/
> http://www.udarrell.com/my_pages2.htm (* My Airconditioning Links, Hunting
> Shooting, Angus Cattle, etc.)
>
>
http://www.udarrell.com/principled_adjudication_disputes_administration_justice.html
>
> http://www.udarrell.com/recognizing_real_enemies.html
>
> http://jesuschristsavior.net/Beatitudes.html
> http://www.antiwar.com/ ***
>
> Reality Is Not An Easy Thing To Be Confronted With, or to Accept!



Posted by on August 10, 2007, 3:11 am
> Wiring the humidistat and thermostat in parallel should theoretically wor=
k,
> but.............
>
> most humdistats are designed to *********close********* their contacts wh=
en
> the humidity falls below a specific set-point (so as to energize a
> humidifier) and therefore, will *******do the opposite******* of what the
> original poster intended******* if wired in parallel as recommended.
>
> What is actually needed is a humidistat which closes it contacts when the
> humidity level *****rises***** above a specific set-point,. thereby
> energizing the air conditioning when there is too much humidity.
>
> Using a conventional humidistat as the prior reply indicates will ***NOT
> WORK*** as claimed, and, in fact, will turn on the a/c and keep it on as =
the
> air gets drier.......
>
> Smarty
>
>
>
>
>
> > 1D10T wrote:
>
> >>I read that if you set the T-stat to 70=BA and the H-stat to what you
> >>*perceive* to be a comfort level, the AC only runs to achieve the relat=
ive
> >>humidity set on the H-stat. It went on to say that it helps to keep the
> >>unit
> >>from cycling as often as it normally would, thereby saving electricity =
and
> >>still be comfortable. The THI here for a week has been 110 - 115, and it
> >>just got me to wondering. As inexpensive as the H-stats are I thought it
> >>would be worth a try - or at least the time it takes to do all this
> >>typing.
> >>:-)
> >>Opinions appreciated!
> >>TIA
> >>- - - - - - - - - - - - - - - - - - -
> >>Easy's gettin' harder everyday
> > The two controls are wired in parallel (Not in series) therefore, if
> > either the Temperature or the Humidity set points are Not met, the AC
> > contactor will stay energized & the AC unit will stay running. Especial=
ly
> > if the system is somewhat oversized, it is a good way to go. - udarrell
>
> > --
> > WISDOM PRINCIPLE DIRECTED EMPOWERMENT COMMUNICATIONS - THE REAL POLITIC=
AL
> > ISSUES and WISDOM BASED PEOPLE EMPOWERMENT
>
> >http://www.udarrell.com/
> >http://www.udarrell.com/my_pages2.htm(* My Airconditioning Links, Hunting
> > Shooting, Angus Cattle, etc.)
>
> >http://www.udarrell.com/principled_adjudication_disputes_administrati...
>
> >http://www.udarrell.com/recognizing_real_enemies.html
>
> >http://jesuschristsavior.net/Beatitudes.html
> >http://www.antiwar.com/***
>
> > Reality Is Not An Easy Thing To Be Confronted With, or to Accept!- Hide=
quoted text -
>
> - Show quoted text -


And if the system only ran to reach the desired humidity level, why
would you need the thermostat at all? One would think that in a
period when you have a temp humidity index of 110-115, which sounds
like a jungle, that any reasonable AC system would have dropped the
humidity to a comfortable level before reaching 70 deg., which sounds
mighty coool. If you want to save money and time, just raise the
thermostat to 75 or higher, which should still feel like a freezer if
you really have a 110-115 THI outside.


Posted by udarrell on August 10, 2007, 1:55 pm
Smarty wrote:

>Wiring the humidistat and thermostat in parallel should theoretically work,
>but.............
>
>most humdistats... -
>
(That is a Dehumidifier "DeHumidistat" for the Cooling Mode, "Not the Heating
Mode Humidifier Humidistat.")

>- ... are designed to *********close********* their contacts when the
humidity falls below a specific set-point (so as to energize a
>humidifier) and therefore, will *******do the opposite******* of what the
>original poster intended******* if wired in parallel as recommended.
>
>
The room TH has two Modes - Heating & Cooling, in the cooling mode,
wired parallel, the circuit would stay closed until the Setpoints of
both sensible temp & % RH were met.
In the Heating mode the Humidistat contacts would work the opposite way
& close to bring the humidifier on when the RH got too low.
Because Heat & Cool are separate circuits', each separate circuit can be
"wired in parallel to do different or opposite things.
The Humidity controller in each separate circuit is engineered to
perform differently, in the Heating Mode the Humidistat contacts are
open until the low %RH setpoint is reached & then the contacts close
bringing on the humidifier. The "Cooling Mode Dehumidification
controller & circuitry" works the opposite.

If they are wired in series, as soon as one of the two setpoints' is
reached the control circuit to the contactor in the cooling AC mode
would open shutting it off before the other setpoint was reached. The
entire purpose is to keep the AC running until both comfort level
setpoints are reached. The setpoints of the individual RM TH & the
dehumidistat can be set at a point where the individual wants each one
for their desired comfort in either the Cooling or Heating Modes.

There should also be a differential settings on both setpoints so the
controller can eliminate short cycling, especially of the AC in the
Cooling Mode.
http://www.udarrell.com/air-conditioning-contractors-seer-eer-sensible-latent-heat.html

- udarrell

>What is actually needed is a humidistat which closes it contacts when the
>humidity level *****rises***** above a specific set-point,. thereby
>energizing the air conditioning when there is too much humidity.
>
>Using a conventional humidistat as the prior reply indicates will ***NOT
>WORK*** as claimed, and, in fact, will turn on the a/c and keep it on as the
>air gets drier....... Smarty
>
>
Sorry Smarty, but that is NOT the way the two separate circuitry's of
separate Heating & Cooling Modes will be wired. (See Above.)
- udarrell

>
>
>>1D10T wrote:
>>
>>
>>>I read that if you set the T-stat to 70º and the H-stat to what you
>>>*perceive* to be a comfort level, the AC only runs to achieve the relative
>>>humidity set on the H-stat. It went on to say that it helps to keep the
>>>unit
>>>
>>>
>>>from cycling as often as it normally would, thereby saving electricity and
>>
>>
>>>still be comfortable. The THI here for a week has been 110 - 115, and it
>>>just got me to wondering. As inexpensive as the H-stats are I thought it
>>>would be worth a try - or at least the time it takes to do all this
>>>typing.
>>>:-)
>>>Opinions appreciated!
>>>TIA
>>>- - - - - - - - - - - - - - - - - - -
>>>Easy's gettin' harder everyday
>>>
>>>
>>The two controls are wired in parallel (Not in series) therefore, if
>>either the Temperature or the %Relative Humidity set points are Not met, the
AC
>>contactor will stay energized & the AC unit will stay running. Especially
>>if the system is somewhat oversized, it is a good way to go. - udarrell
>>
>>
--

WISDOM PRINCIPLE DIRECTED EMPOWERMENT COMMUNICATIONS -
THE REAL POLITICAL ISSUES and WISDOM BASED PEOPLE EMPOWERMENT

http://www.udarrell.com/my_pages2.htm
(* My Airconditioning Links, Hunting Shooting, Angus Cattle, etc.)

Reality Is Not An Easy Thing To Be Confronted With, or to Accept!

Page 1 of 4       1 2 3 > last >>
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